<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<script>
    // 实践输入计算
    let num1 = +prompt("输入第一个数字")
    let num2 = +prompt("输入第二个数字")
    alert(`相加等于${num1+num2}`)
</script>
</body>
</html>

